Bottles and jars – Closures – Stopper type
Patent
1993-04-16
1995-01-03
Elkins, Gary E.
Bottles and jars
Closures
Stopper type
215307, 215355, B65D 4128
Patent
active
053778545
ABSTRACT:
A stopper assembly for a test tube or similar article comprised of an inner elastomeric stopper and an outer semi-rigid cap member that protects the inner elastomeric stopper and assists in the manual manipulation of the inner elastomeric stopper and provides enhanced visible color coding through the combination of colored stoppers and caps. The elastomeric stopper is dimensioned to fit within the open end of a test tube with an interference fit. The lower end of the elastomeric stopper has grooves disposed across its outer surface. When the lower end of the stopper is inserted into the open end of the test tube, gases are permitted to pass through the grooves, and the test tube is vented to its surrounding environment. The upper end of the elastomeric stopper does not include venting grooves. As such, when the upper end of the stopper is inserted into the open end of the test tube, a gas impervious seal is formed between the stopper and the test tube, thereby isolating the contents of the test tube from the surrounding environment.
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patent: 5297561 (1994-03-01), Hulon
Elkins Gary E.
International Technidyne Corp.
Pascua Jes F.
Plevy Arthur L.
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